Not thoroughly or abundantly impregnated with the usual or required ingredients, or with stimulating and nourishing substances; of less than the usual strength; as, weak tea, broth, or liquor; a weak decoction or solution; a weak dose of medicine.

(h)

Lacking ability for an appropriate function or office; as, weak eyes; a weak stomach; a weak magistrate; a weak regiment, or army.

2.

Not possessing or manifesting intellectual, logical, moral, or political strength, vigor, etc.

Guard thy heart
On this weak side, where most our nature fails.
Addison.

(e)

Wanting in power to influence or bind; as, weak ties; a weak sense of honor of duty.

(f)

Not having power to convince; not supported by force of reason or truth; unsustained; as, a weak argument or case.

"Convinced of his weak arguing."

Milton.

A case so weak . . . hath much persisted in.
Hooker.

(g)

Wanting in point or vigor of expression; as, a weak sentence; a weak style.

(h)

Not prevalent or effective, or not felt to be prevalent; not potent; feeble.

"Weak prayers."

Shak.

(i)

Lacking in elements of political strength; not wielding or having authority or energy; deficient in the resources that are essential to a ruler or nation; as, a weak monarch; a weak government or state.

I must make fair weather yet awhile,
Till Henry be more weak, and I more strong.
Shak.

(k) Stock Exchange

Tending towards lower prices; as, a weak market.

3. Gram. (a)

Pertaining to, or designating, a verb which forms its preterit (imperfect) and past participle by adding to the present the suffix -ed, -d, or the variant form -t; as in the verbs abash, abashed; abate, abated; deny, denied; feel, felt. See Strong, 19 (a).

(b)

Pertaining to, or designating, a noun in Anglo-Saxon, etc., the stem of which ends in -n. See Strong, 19 (b).

⇒ Weak is often used in the formation of self-explaining compounds; as, weak-eyed, weak-handed, weak-hearted, weak-minded, weak-spirited, and the like.

Weak conjugation Gram., the conjugation of weak verbs; -- called also new, ∨ regular, conjugation, and distinguished from the old, or irregular, conjugation. -- Weak declension Anglo-Saxon Gram., the declension of weak nouns; also, one of the declensions of adjectives. -- Weak side, the side or aspect of a person's character or disposition by which he is most easily affected or influenced; weakness; infirmity. -- Weak sore ∨ ulcerMed., a sore covered with pale, flabby, sluggish granulations.